Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6380
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dc.contributor.authorSevinçli, Haldun-
dc.date.accessioned2017-10-18T13:17:40Z
dc.date.available2017-10-18T13:17:40Z
dc.date.issued2017-04
dc.identifier.citationSevinçli, H. (2017). Quartic dispersion, strong singularity, magnetic instability, and unique thermoelectric properties in two-dimensional hexagonal lattices of group-VA elements. Nano Letters, 17(4), 2589-2595. doi:10.1021/acs.nanolett.7b00366en_US
dc.identifier.issn1530-6984
dc.identifier.issn1530-6984-
dc.identifier.issn1530-6992-
dc.identifier.urihttp://doi.org/10.1021/acs.nanolett.7b00366
dc.identifier.urihttp://hdl.handle.net/11147/6380
dc.description.abstractThe critical points and the corresponding singularities in the density of states of crystals were first classified by Van Hove with respect to their dimensionality and energy-momentum dispersions. Here, different from saddle-point Van Hove singularities, the occurrence of a continuum of critical points, which give rise to strong singularities in two-dimensional elemental hexagonal lattices, is shown using a minimal tight-binding formalism. The model predicts quartic energy-momentum dispersions despite quadratic or linear ones, which is also the origin of the strong singularity. Starting with this model and using first-principles density functional theory calculations, a family of novel two-dimensional materials that actually display such singularities are identified and their extraordinary features are investigated. The strong singularity gives rise to ferromagnetic instability with an inverse-square-root temperature dependence and the quartic dispersion is responsible for a steplike transmission spectrum, which is a characteristic feature of one-dimensional systems. Because of the abrupt change in transmission at the band edge, these materials have temperature-independent thermopower and enhanced thermoelectric efficiencies. Nitrogene has exceptionally high thermoelectric efficiencies at temperatures down to 50 K, which could make low-temperature thermoelectric applications possible.en_US
dc.description.sponsorshipTUBITAK (113C032 -- 115F445 -- 115F408); Izmir Institute of Technology (BAP-2015-IYTE-36); BAGEP program of the Science Academy, Turkeyen_US
dc.language.isoenen_US
dc.publisherAmerican Chemical Societyen_US
dc.relationinfo:eu-repo/grantAgreement/TUBITAK/BIDEB/113C032en_US
dc.relationinfo:eu-repo/grantAgreement/TUBITAK/MFAG/115F445en_US
dc.relationinfo:eu-repo/grantAgreement/TUBITAK/MFAG/115F408en_US
dc.relation.ispartofNano Lettersen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectMagnetic instabilityen_US
dc.subjectQuartic dispersionen_US
dc.subjectThermoelectricityen_US
dc.subjectVan Hove singularityen_US
dc.subjectTwo-dimensional materialsen_US
dc.titleQuartic dispersion, strong singularity, magnetic instability, and unique thermoelectric properties in two-dimensional hexagonal lattices of group-VA elementsen_US
dc.typeArticleen_US
dc.authoridTR21371en_US
dc.institutionauthorSevinçli, Haldun-
dc.departmentIzmir Institute of Technology. Materials Science and Engineeringen_US
dc.identifier.volume17en_US
dc.identifier.issue4en_US
dc.identifier.startpage2589en_US
dc.identifier.endpage2595en_US
dc.identifier.wosWOS:000399354500070en_US
dc.identifier.scopus2-s2.0-85017428412en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1021/acs.nanolett.7b00366-
dc.identifier.pmid28318269en_US
dc.relation.doi10.1021/acs.nanolett.7b00366en_US
dc.coverage.doi10.1021/acs.nanolett.7b00366en_US
dc.identifier.scopusqualityQ1-
item.cerifentitytypePublications-
item.openairetypeArticle-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextopen-
item.fulltextWith Fulltext-
crisitem.author.dept03.09. Department of Materials Science and Engineering-
Appears in Collections:Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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